Note 13 - Accumulated Other Comprehensive Loss - Summary of Reclassifications from Accumulated Other Comprehensive Loss to Net Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Amortization of defined benefit plan pension items: (1)
Amortization of loss (2)	[1],[2]	$ 67	$ 225
Income tax effect	[2]	(19)	(64)
After tax	[2]	48	161
Amortization of gain on interest rate swap: (3)
Reclassification to interest expense	[3]	(706)	(444)
Income tax effect	[3]	200	128
After tax	[3]	(506)	(316)
Total reclassifications net of income tax		$ (458)	$ (155)

[1] Included in “Other income (expense), net” on the Company’s Consolidated Statements of Comprehensive Income.

[2] See Note 14 "Retirement Plans" for additional information regarding the Company's pension plans.

[3] See Note 7 "Fair Value Measurements" for additional information regarding the Company's interest rate swaps.